Improved Piping Products, Inc.® (IPP) is the sole manufacturer of the IPP Deltaflex® backup ring and slip-on welded flange, a technological breakthrough in the flange industry. Our patented design brings cost effectiveness and greater safety to an industry where savings and risk management are a necessity in maintenance and construction of various projects. We have specialized in flange design since 1979 and furnish IPP Deltaflex ® backup rings to a broad cross section of industrial and municipal users worldwide. IPP backup rings are made to exacting specifications and conform to the highest standards of quality assurance.